Bristol compressors international, inc. is an american company (founded in 1974, based in bristol, virginia), which produces about 5 million full-thermal scrolls and lifting piston compressors in the power range of 4 to 70 kw per year. multinational company offers its product range of large and retailers to 6 continents, in 60 countries. the production takes place in the main work in bristol, virginia (u.s.a). in an area of ??65,000 m2, in addition to the modern production sites of the company headquarters, the sales and shipping office, the development and research department and the large extradition warehouse, which with 18,000 m2 allows smooth logistics for global sales. each bristol hermetic lifting piston compressor has 2 cylinders and internal silencers, that's why is noise and vibration arm. series "a" with sight glass is also suitable for composite circuit. bristol compressors are available in all common voltages at 50/60 hz, developed for refrigerants r22, r407c, r134a and r404a. energy-efficient, environmentally friendly bristol compressors convince with compact and hermetic design, high efficiency, mechanical strength and reliability and long life. bristol product range complies with the us and european policies and has the certifications: quality management system standard iso 9001, iso 14001-2004, siwp and ped certificates. the structure of the type number of bristol compressors is as follows: